Revolving window-sash.



N0. 6965"). Patented Apr. I, I902.

C. D. TABUR. I REVOLVING WINDOW SASH.

(Application filed July 12, 1901.) (No Model.) ZSheets-Sheat I.

(Nb Model.)

Patented Apr l, I902. 6. D. TABOR.

REVOLVlNG WINDOW SASH.

(Application filed Ju1yl2, 1901.)

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' Miran Sterne PATENT @rricn.

CLINTON D. TABOR, OF NE\VARK, NEW JERSEY, ASSIGNOR TO TABOR SASH COMPANY, OF NElVARK, NElV JERSEY.

REVOLVlNG WINDOW-=SASH.

srncrrronrroiv forming part of Letters Patent is. 696,516, dated April 1, 1902.

Application filed July 12, 1901.

To all whom, it may concern: Be it known that I, CLINTON D. TABOR, a citizen of the United States, residing at Newark, in the county of Essex and State of New Jersey, have invented new and useful Improvements in Revolving Window-Sash, of which the following is a specification.

This invention relates more particularly to that class of windows in which the sash is in capable of both a sliding and turning motion in its frame for the purpose of opening and closing the window or to permit of reversing the window for cleaning both sides of the same from the inside of the building; but parts of this invention are also applicable to sashes which are only capable of turning in the window-frame.

A window which is capable of a combined sliding and turning movement is shown and described in Letters Patent of the United States No. 621,953, March 28, 1899, and No. 667,745, February 12, 1901.

The object of this invention is to improve the means whereby the sash is pivotally connected with its supporting or guide bars, to provide means for holding the guide-bar and the sash firmly together without the use of springs, and to improve the means whereby the sash may be detached from the guide-bar.

In the accompanying drawings,consistingof two sheets, Figure 1 is an inside elevation, partly in section, of a window provided with my improvement-s. Fig. 2 is a vertical transverse section in line 2 2, Fig. 1. Fig. 3 is a vertical section, on an enlarged scale, of one of the pressing-levers whereby the guide-bar is pressed against the sash. Fig. 4- is a face view of the same. Fig.5 is a perspective viewof the pressingdever, showing the same opened for permitting the attachment thereto of the balancing-chain. Fig. 6 is a fragmentary vertical section, on an enlarged scale, of one side of the window. Figs. 7 and S are fragmentary vertical sections in lines 7 7 and 8 S, Fig. 6, respectively, looking in opposite directions. Figs. 9 and 10 are fragmentary horizontal sections in lines 9 0 and 10 10, Fig. 7, respectively. Fig. 11 is a perspective view of the retaining-catch and its support whereby the guide-bar is held in its lowered posi- Serial No. 67,945. (No model.)

tion when it is desired to detach the sash therefrom.

Like letters of reference refer to like parts in the several figures.

Although the drawings show my improve- 55 ments applied to a windowin which the frame, sash, and guide-bar are constructed of sheet metal, these improvements are also applicable to windows which are made of wood or partly of wood and metal.

A represents the window-frame, which is provided on the inner sides of its stiles with the usual vertical guideways Cb.

B B represent the upper and lower sashes, and C the guide-bars or hanging strips, which are arranged between the vertical edges of the sashes and the guideways. Owing to the sheet-metal construction of the sashes the stiles and cross-bars thereof are hollow. The guide-bars, which are also represented as being made of sheet metal, are likewise hollow and have substantially the form of the letter U in cross-section. The outer sidec of each guide-bar is of the same width as the space between the edge of the sash and the bottom of its guideway, while the inner side 0 of the guide-bar is of less width, so as to permit the guide-bar to rock or turn transversely in the guideway toward and from the edge of the sash. During this turning movement of the So guide-bar the same fnlcrums with the inner edge of its wide portion upon the bottom of the guideway, which edge is provided with an inwardly-bent longitudinal flange c to provide a wide bearing-surface for the gnidebar on the bottom of the guideway. The i11- ner edge of the narrow side of the guide-bar is likewise provided with an inwardly-turn ing longitudinal flange c for stiffening the guide-bar O. 0

D represents a locking tenon orrib which is formed lengthwise on the outer edge of the guide-bar and fitting into a corresponding groove or recess d, formed in the opposing outer edge of the adjacent sash-stile. Upon 5 turning the sash the guide-bar is moved inwardly by the wedge action between the rib and groove of these parts in a manner well known to this type of window.

E represents a horizontal pin which pivotto:

ally connects the central parts of the adjacent sash-stile and guide-bar. The body of this pin is of cylindrical form and seated with its inner end in a bearing f, which is formed partly in the outer side of the sash-stile and partly in a platef, which is secured within the hollow sash-stile. The outer end of the pivot-pin projects inwardly through a curved slot G, formed partly in the inner side of the guide-bar and partly in a reinforcing orsupporting plate g, which is secured within the hollow guide-bar. The slot G extends from the inner shoulder of the lockingrib or tenon on the guid e-bar outwardly and downwardly. At the lower end of this slot the supportingplate 9 is provided with a horizontal ledge or shoulder g, which extends from the inner to the outer side of the guide-bar. On the outer end of the pivot-pin is arranged a bearinghead II, which has a flat under side resting normally in a horizontal position upon the shoulder of the supporting-plate and which extends laterally inward and outward from the pivot-pin. When the sash is free to turn on the pivot-pin, the latter is held by the weight of the sash in the lower part of the guide-slot and the pivot-pin is held against turning by reason of its head engaging with its fiat under side against the shoulder g of the supporting-plate. The sash is permitted to turn freely on the pivot-pin when it is desired to reverse the sash for facing either side of its pane inwardly to facilitate cleaning of the same from the inside of the building.

In order to cause the sash to close automatically when free, a locking contrivance is provided, whereby the pivot-pin is rigidly connected with the sash, so that upon turning the window its pivotal point will be shifted from the axis of the pivot-pin to the inner end it of its head. When the pivotal point of the sash is thus shifted, its weight 011 the outer side of its pivot preponderates and constantly tends to turn the sash into its closed Vertical position. The pivot-pin is permitted to move upwardly and inwardly bodily, together with the sash, when the latter fulcrums on the inner end of the bearing-head II by forming the guide-slot G concentric with the fulcrum h of the head, as shown in Fig. 7.

I represents a locking-bolt which is adapted to be engaged with or disengaged from a shank i on the inner end of the pivot-pin for causing the pivot-pin to turn with the sash or to permit the sash to turn. on the pivotpin. This bolt is forked or bifurcated and movable transversely with reference to the sash-stile and pivot-pin between guides 21 2', formed on the plate f above and below the locking-bolt, as shown in Figs. 6, 8, 9, and 10. The outer ends of the arms of the locking-bolt are separated by a wide space, and the inner ends of these arms are separated by a comparatively narrow space. The shank of the pivot-pin is arranged between the arms of the locking-bolt and is preferably of semicylindrical form. locking-bolt outwardly the lower fiat side j of its narrow or contracted portion engages with the lower flat side j of the pivot-shank, as shown in full lines in Fig. 8, in which position of the parts the sash is locked against turning on the pivot-pin, and the latter, together with its bearing-head, is compelled to turn with the sash. Upon moving the locking-bolt inwardly, so that the pivot-shank is arranged within the enlarged or wide space between the arms of the lockin g-bolt, as shown by dotted lines in Fig. 8, the pivot-shank is disconnected from the sash and the latter is free to turn on the pivot-pin as its fulcrum. The transverse movement of the locking-bolt for coupling and uncoupling the pivot-pin and sash is effected by means of a finger-piece or button J, which is secured to the inner end of the locking-bolt and projects beyond the side of the respective sash-stile.

If it is desired to hold the sash open for ventilating the building when turned on the fulcrum h, a suitable fastening device is provided for this purpose. As shown in Figs. 1 and 2 of the drawings, this is effected by means of a chain K or the like, which is connected with the upper part of the sash and is detachably connected at its lower end with a hook on the lower part of the frame. Upon detaching the chain from the hook the preponderating weight of the sash on the outer side of the fulcrum It causes the same to swing automatically into its vertical or closed position. In order to cause the sash to thus close automatically in case of a fire near the window without requiring the chain to be detached from the hook, a fusible link 7a of any suitable construction is placed in the chain. hen the fire near the window raises the temperature high enough to melt the fusible link, the partially-opened sash will be released and will swing into its closed position. The automatic closing of the window in this manner thus renders the same particularly desirable for preventing the spreading of flames through said window. The glass pane of a fireproof window usually contains woven wire or similar material to prevent the glass from falling out of the sash when cracked by flames.

In order to cause the bearing-head II to move readily out of the guide-slot G upon detaching the sash from the guide-bar, a guidehorn Z is provided for this purpose. This guide-horn is arranged on the inner side of the supporting-plate g and projects from the upper end of the guide-slot G outward and downward beyond the inner side of the bearinghead. Upon raising the bearing-head, together with the pivot-pin and sash, for removing the same from the guide-bar the bearing-head engages with the inclined outer side of the guide-horn and is directed by the latter toward the outlet of the guide-slot G, thereby preventing the bearing-head from catching on the inner side of the supporting- U'pon moving the plate. The pivot-pin is prevented from being withdrawn from the sash by providing the stern of the pivot-pin on its upper curved side with a circumferential groove m, which receives the upper arm of the locking-bolt, as shown in Fig. 6. This construction while preventing the pivot-pin from being withdrawn from the sash, still permits the sash to turn upon the pivot-pin when uncoupled from the same. The groove in the pivotstem is sufliciently wide to permit of the requisite axial movement of the pivot-pin in the sash andguide-bar as the guide-bar moves toward and from the sash upon turning the sash. l/Vhen the pivot-pin is coupled or rigidlyconnected with the sash, so that the sash upon being tilted fulcrums on the inner end 7L of the bearing-head, the sash can onlybe turned partially, this movement of the sash being limited by the length of the slot Gin the supporting-plate, which is sufficient to turn the sash for ventilating the room, but not to permit the sash to be reversed. When it is desired to reverse the sash for cleaning either side of the pane from the inside of the building or for other purposes, thesash must be disconnected from the pivot-pin, so that the sash can turn completely around on the pivotpin. It will thus be seen that by pushing the locking bolt outwardly and coupling the pivot-pin and sash the sash when released after being partially turned will always close automatically and that the sash can be reversed completely on the pivot-pin at the will of the attendant after withdrawing the locking-bolt inwardly and uncoupling the sash and pivot-pin.

The movement of the guide-bar away from the edge of the sash upon opening the latter is resisted by a tension or pressing device, which constantly presses the guide-bar toward the sash and causes the rib of the guidebar to firmly interlock with the groove of the sash when the latter is in its normal vertical position. This tension device is constructed as follows:

N represents the flexible supporting member of the sash-balancing means, which, as shown in the drawings, consists of a chain, but may consist of a cord or the like. This chain passes with its upperportion around a sash-pulleyn, secured to the top of the framestile, and is secured at the lower end of its outer portion to an eye a, arranged on the inner side of the lower part of the guide-bar, while its outer end, which is arranged within the windowframe, is connected with a balancing-weight n 0 represents a plurality of pressing or toggle levers, which are mounted upon the sashchain within the guide-bar and whereby the latter is pressed against the edge of the sash. Each of these levers is of elbow form and applied to the balancing-chain, so as to form a deflection or kink in the same, whereby the weight of the sash in tending to straighten the chain causes the lever to turn and press the guide-bar against the sash. Each of the pressing-levers bears at its elbow against the back of the guide-bar, and its lower end bears against the back of the guideway, and the chain is secured with its deflected portion to the pressing-lever adjacent to its elbow and bears above the elbow against the upper end of the lover. The lever consists, preferably, of a short attaching-section 1) and a long adj ustingsection p,which sections are arranged side by side and capable of adjustment upon each other for the purpose of increasing or decreasing the amount of deflection in the chain. The lower ends of the two lever-sections are pivotally connected by a pin 19 which preferably carries an antifriction-roller 19 which engages with the guideway and reduces the friction as the pressing-lever moves up and down on the guideway. The attaching-section has its lower portion bifurcated and straddles the roller. The upper part of the attaching-section is provided with upper and lower jaws q q, forming a chain-receiving socket or month between the jaws, which opens laterally toward that side of the attaching-section on which the adjusting-section of the lever is arranged. Theadjusting-section ofthepressing-lever-is provided at its upper end with a bearing-finger Q2, which bears against the back of the balancing-chain above the elbow. For the purpose of attaching the balancing-chain to the pressing-lever the sections of the latter are swung apart, as shown in Fig. 5, so as to uncover the outlet of the chain-socket. balancing-chain is then inserted in this socket, with the front or outer part of the chain passing downwardly on the front side of the lower jaw q and with the upper or rear partof the chain passing upwardly along the rear side of the upper jaw q, thereby producing a deflection in the balancing-chain. The adjustingsection is then closed over the socket of the attaching-section and the bearing-finger at its upper end is engaged behindthe upper part of the balancing-chain, as represented in Figs. 3,4, and 6. 'When the pressing-lever is in its normal operative position between the guide way and bar, the bearing-points of the lever on these parts are arranged'tra'nsversely out of line and the lower part of the lever stands at an angle to the guide bar and way. The pull of the chain constantly tends to straighten the deflected part of the chain, thereby turning the lever and producing a toggle action of the same, which causes the guide=bar to be pressed away from the guideway and against the guide-bar in the direction of the arrows, Fig. 6. This pull upon the chain is produced by the weight of the guide-bar and the sash mounted thereon. The pressure which the lever exerts against the guide-bar depends on the amount of effective deflection in the chain, which deflection can be varied to provide the requisite pressure against the guide-bar by adjusting the section 1) of the lever relatively to the section 1). The pull of the chain presses the adj usting- The ICC

IIO

section 19 in the direction of the arrow, Fig. 3. The movement of the adj Listing-section in this direction is limited by ascrew r, mounted on :1. lug on the adjusting-section and bearing against the inclined face 1- of astop-lug on the adjacent upper side of the attaching-section. Thisinclined face is eccentric with reference to the pivot connecting the sections, so that upon turning the screw forwardly or backwardly the bearing end of the latter engages with a higher or lower part of this inclined face, thereby varying the amount of deflection in the chain. Upon turning the screw inwardly, so that it bears against the higher part of the inclined face 7', the upper end of the adjusting-section will be held in such a position that the effective deflection produced in the balancing-chain will be comparatively great, thereby causing the pressing-lever to press the guide-bar against the sash with considerable force. Upon adjusting the screw so that it bears against a lower portion of the incline face 1" the free end of the adj usting-section will be held in a position in which the amount of eifective deflection in the chain is decreased, thereby reducing the pressure of the 'lever against the guide-bar proportionately. As shown in the drawings, Figs. 3 and 6, the adjusting-section p is shifted into its innermost 'position,in which position the upper and lower parts ofthe chain stand out of line the greatest distance and the greatest effective deflection is produced in the chain, whereby the lever exerts the greatest pressure against the guide-bar. Upon adjusting the lever-section p outwardly on the lower section 19, so that the parts of the chain above and below the lever are more nearly in line, the amount of eifective deflection in the chain will be reduced and the pressure of the lever against the guide-bar will be likewise reduced.

In order to prevent the upper jaw of the chain-socket from being bent out of place by the strain which is applied to it by the chain, the adj Listing-section of the pressing-lever is provided with a retaining-lug s, which engages underneath said upper jaw when the parts are in their operative position, as shown in Figs. 3 and 4c. The upper jaw of the attaching-section is confined atits free end between the retaining-lug s and the adjustingscrew 1, whereby the adjusting-section receives part of the strain which is put upon the upper jaw.

Asshown in the drawings, two pressinglevers are arranged upon the balancing-chain and bear against the guide-bar and guideway aboveand belowthe pivot of the sash. This number, however, may be varied, according to the length and weight of the sash.

In my improved means for chaining the guide-bar and sash together the necessary pressure is derived from the weight of these parts, thereby dispensing with the usual springs which are employed for the purpose and which are liable to break or get out of order.

While I have herein shown my improved pressing device applied to a sliding guide-bar and sash for yieldingly holding these parts together by their own weight it is obvious that the same is equally applicable to guidebars and sashes which do not slide.

In order to hold the guide-bar in its lowered position while removing the sash therefrom and permit the sash to be conveniently replaced upon the guide-bar, a retaining device is provided, which is constructed as follows:

T represents a catch arranged within the lower portion of the guide-bar and having the hook tat its lower end projecting upwardly and backwardly toward the back of the guideway, while its shank or bar 6 projects upwardly along the back of the guidebar. The upper end of the shank is provided with a cross-bar it, which is arranged to slide vertically between two vertical guide-loops a, which are secured to the back of the guidebar on opposite sides of the shank. These guide-loops are preferably cast in one piece with the eye or, which receives the balancingchain.

'0 represents a shoulder formed on the back of the guideway near the lower end thereof. This shoulder is formed by slitting the guideway and pressing the metal below the slit inwardly or backwardly, so as to form an opening a) in the guideway below said shoulder and an incline 19, leading from the face of said guideway toward the rear end of said opening. The weight of the catch is so determined that it hangs with its prong normally out of reach of the shoulder 12. In the raised or open position of the sash the catch projects with its hooked lower end below the lower end of the guide-bar, the catch being supported in this position by its cross-bar u engaging with the lower ends of its guideloops to. Upon closing or lowering the sash to its fullest extent the catch engages with the lower part of the window-frame and is pushed into the lower end of the guide-bar, during which movement the guide-loops of the guide-bar slide downwardly upon the cross-bar of the catch. When it is desired to hold the guide-bar against upward movement while removing the sash from the guidebar, the sash, together with its guide-bar, is first raised sufliciently to permit the catch to project below the lower end thereof. The catch is then pushed by hand backwardly against the guideway. WVhen the catch during this upward movement with the guidebar and sash reaches the incline 0 it follows this incline by reason of the pressure which is applied to the same and is directed into the opening between the incline o and shoulder 0), so that the catch engages with its hook against said shoulder and arrests the upward movement of the guide-bar. During the continued upward movement-of the sash after the guide-bar has been thus arrested the sash is lifted, with its pivot, out of the guideslot G in the guide-bar. While the sash is thus removed the guide-bar is held by the catch T in its depressed position and within convenient reach, so as to permit of readily replacing the sash upon the guide-bar. After the sash has been replaced on the guidebar the sash and bar are pushed downwardly and the catch automatically disengaged by gravity from the shoulder 12 and drops into its normal position. If for any reason the catch should stick in the opening r, the catch will be forcibly disengaged from said opening by the upper end of the guide-loop engaging with the cross-bar of the catch and the incline o engaging with the heck of the catch.

I claim as my invention 1. The combinationwiththe window-frame, the sash and the guide-bar arranged between the sash and frame, of a coupling having a pivotal connectionwith the sash and a fulcrum on said guide-barmaid pivotal connection and fulcrum being arranged out of line with each other, substantially as set forth.

2. The combination with the window-fram e, the sash and the guide-bararranged between the sash and frame, of a coupling having a pivotal connection with the sash and having a fulcrum on said bar which is eccentric to said pivotal connection, and means for rigidly connecting thesash and coupling ordisconnecting the same, substantially as .set forth.

3. The combination with the window-frame having a guide, and a sash arranged within the frame, of a guide-bar arranged between v the sash andsaid guide, a pin pivotally conbearing on the sash and in nected with the sash, a head arranged on said pin and having a flat underside which bears against a shoulder on the bar, and means for rigidly connecting the sash and pin or disconnecting the same, substantially as set forth.

4. The combination with the Window-frame, the sash and the guide-bararranged between the sash and frame, of a pin connected with the sash and passingthrough a curved slot in the bar, said pin being fulcrumed on one side on said bar concentric with theaxis of said curved slot, substantially as set forth.

5. The combination withthe window-fra me, the sash and the guide-bar arranged between the sash and frame, of a pin arranged in a a curved slot in said bar, a head arranged on said pin and fulcrumed on one side on a shoulder on the bar, said slot being curved concentric with the fulcrum of said head, and a locking device for rigidly connecting the pin and sash or disconnecting the same, substantially as set forth.

6. The combination with the window-frame, the sash and the guide-bar arranged. between the sash and frame, of a pin connected with the sash and arranged in a curved slot in said bar, a head arranged on the pin and adapted to fulcrum on the bar concentric with said slot, and a guide arranged on the bar for guiding said head out of said slot, substantially as set forth.

7. The combination with the window-frame, the sash and the guide-bar arranged between the sash and frame and having a longitudinal rib engaging with a corresponding groove in the sash, of a pin connected with the sash, a head arranged on the pin and fulcrumed on a shoulder on the bar, said pin being arranged in a slot which is formed partly in the guidebar and partly in a plate on said bar and concentric with said fulcrum and having its inner end arranged adjacent to said shoulder and its outer end arranged in the rib of the bar, and a gnide-horn arranged on said plate adjacent to the outer end of said slot for guiding said head out of said slot, substantially as set forth.

8. The combination with the window-frame, the sash and the guide-bar arranged between the frame and sash, of a pin pivotally connected with the sash and having a flat-sided stem at one end and a head at its opposite en d which is fulcrumed on the guide-bar, and a locking-bolt guided on the sash and adapted to engage with the flat side of said stem, substantially as set forth.

9. The combination with the window-frame, the sash and the guide-bar arranged between the sash and frame, of a pin pivotally connected with the sash and having a fiat-side stem at one end and a head at its opposite end which is fnlcru med on the guide-bar, and a forked locking-bolt guided on the bar and adapted to engage with said stem for preventing turning of the sash on said pin, substantiallyas set forth.

10. The combination with the windowframe, the sash and thegnide-bar arranged betweenthe sash and frame, of a pin pivotally connected with the sash and having a head at one end Which is fulcrumed on the guide-bar, a semicylindrical stem arranged at the opposite end of the pin and havinga circumferential groove and a fiat side, and a forked locking-bolt guided on the sash and adapted to engage its arms with the groove and the fiat side of said stem, substantially as set forth.

11. The combination with the Windowframe, the sash and the guide-bar arranged between the sash and frame, of a pin pivotally connected with the sash and having a head at one end which is fulcrumed on the guide-bar and a flat-side stem at its opposite end, and a forked locking-bolt guided on the sash and having a wide space between its arms in which said stem is capable of turning in the locking-bolt and a narrow space in which the stem is held against turning in the lock ing-bolt, substantially as set forth.

12. The combination with the windowframe, the sash and the supporting-bar pivotally connected with the sash, of a pressing device which is actuated by the weight of the sash and bar for pressing 'these parts together, substantially as set forth.

13. The combination with the windowframe, the sash and the guide-bar pivotally connected. with the sash, of a balancing-chain or the like, and a pressing device which is actuated by the weight of the sash and guidebar for yieldingly pressing these parts together, substantially as set forth.

14. The combination with the windowframe, the sash, and the guide-bar pivotally connected with the sash, of a balancing-chain or the like connected with the guide-bar, and a pressing-lever which is interposed between the guide-barand the frame and to which said chain is connected in a deflected condition, substantially as set forth.

15. The combination With the Windowframe, the sash and the guide-bar pivotally connected with the sash, of a balancing-chain or the like connected with the guide-bar, and a pressing-leverbearing against the frame and bar and having a laterally-opening socket in which the chain is placed in a deflected condition, substantially as set forth.

16. The combination with the Windowframe, the sash and the guide-bar pivotally connected with the sash, of a balancing-chain or the like connected with the guide-bar, a pressing-lever which bears against said frame and bar and to which said chain is attached in a deflected condition, and means for adjusting the amount of deflection in said chain, substantially as set forth.

17. The combination with the windowframe, the sash and the guide-bar pivotally connected with the sash, of a balancing-chain or the like connected with the guide-bar, and a pressing-lever which bears against said frame and bar and which has an attaching-section to which a deflected portion of the chain is attached and an adjustable section for varying the amount of deflection in said chain, substantially as set forth.

18. The combination with the windowframe, the sash and the guide-bar pivotally connected with the sash, of a balancing-chain or the like connected with the guidebar, a pressing-lever bearing against the frame and bar and consisting of an attaching-section which has a laterally-opening socket for receiving a deflected portion of the chain and an adj listing-section constructed to close said socket and to bear against said chain, substantially as set forth.

1E). The combination with the windowframe, the sash and the guide-bar pivotally connected with the sash, of a balancing-chain or the like connected with the guide-bar, a pressing-lever bearing against the frame and guide-bar and consisting of an attaching-section which receives a deflected portion of said chain and an adjusting-section pivoted on the attaching-section and bearing against said chain, and an adj usting-screw arranged on the adjusting-section and bearing against an inclined stop on the attaching-section, substantially as set forth.

20. The combination with the windowframe, the sash and the guide-bar pivotally connected with the sash,of a balancing-chain or the like connected with the guide-bar,a pressing-lever bearing against the frame and guide-bar andconsisting of an attaching-section and an adjusting-section, said attachingsection having upperand lower jaws forming a laterally-opening socket which received a deflected portion of said chain and said adjust ing-section having a finger bearing against the chain, a screw bearing against an inclined stop in the upper side of said upper jaw and a retaining-lug bearing against the under side of said upper jaw, substantially as set forth.

21. The combination with the windowframe, the sash and the guide-bar pivotally connected with the sash, of a balancing-chain or the like connected with the guide-bar, a pressing-lever bearing against the frame and guide-bar and consisting of attaching and adjusting sections which are pivotally connected at one end by a pin, said attaching-section having upper and lower jaws which form a laterally-opening socket in which a deflected portion of the chain is seated and an inclined stop on the upper side of the upper jaw, and said adjusting-section having a finger which bears against said chain, an adj Listing-screw which bears against said inclined stop and a retaining-lug which bears against the under side of said upper jaw, and an antifrictionroller arranged on said pin, substantially as set forth.

22. The combination with the windowframe, the sash and the guide-bar pivotally connected with the sash, of a catch arranged in the lower part of the guide-bar and consisting of a shank provided atits lower end with an upwardly-projecting hook and at its upper end with a cross-bar, a pair of guideloops arranged on the guide-bar and receiving said cross-bar, and a shoulder arranged on the frame and adapted to be engaged by the hook of the catch, substantially as set forth.

23. The combination with a window-frame having a guideway, a shoulder in the back of said guideway, and an incline below said shoulder, of a guide-bar arranged in said guideway,a sash pivotally connected with said bar, and a catch mounted on the guide-bar and having a hook adapted. to engage with the shoulder and the incline on the frame, substantially as set forth.

Witness my hand this 1st day of July, 1901.

CLINTON D. TABOR.

Witnesses:

THEO. L. PoPP, EMMA M. GRAHAM. 

